Blood Vessel

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  • 1/44 Questions

    Which of the following is the blood vessel that distributes blood to organs?

    • Arteries
    • Capillaries
    • Venules
    • Arterioles
    • Veins
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Blood Vessels Quizzes & Trivia
About This Quiz

This Blood Vessel quiz assesses knowledge on the structure and function of various blood vessels, including arteries and veins. It covers topics like blood distribution, vasoconstriction, and the roles of different artery layers, providing a comprehensive understanding for learners interested in human biology.

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  • 2. 

    This is a blood vessel that conveys blood from the tissues back to the heart.

    • Artery

    • Arteriole

    • Aorta

    • Vein

    • Capillary

    Correct Answer
    A. Vein
    Explanation
    A vein is a blood vessel that carries blood from the tissues back to the heart. Unlike arteries, which carry oxygenated blood away from the heart to the tissues, veins carry deoxygenated blood back to the heart. Veins have thinner walls and contain valves to prevent backflow of blood. The correct answer is vein.

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  • 3. 

    Which artery wall is responsible for vasoconstriction?

    • Tunica interna

    • Tunica media

    • Tunica externa

    • Tunica albuginea

    • Tunica fascia

    Correct Answer
    A. Tunica media
    Explanation
    The tunica media is responsible for vasoconstriction. This layer of the artery wall contains smooth muscle cells that can contract and narrow the diameter of the artery, leading to vasoconstriction.

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  • 4. 

    This layer of the artery is composed mainly of elastic and collagen fibers.

    • Tunica interna

    • Tunica media

    • Tunica externa

    • Tunica albuginea

    • Tunica fascia

    Correct Answer
    A. Tunica externa
    Explanation
    The correct answer is tunica externa. The tunica externa, also known as the adventitia, is the outermost layer of the artery. It is composed mainly of elastic and collagen fibers, which provide strength and support to the artery. This layer helps to protect the artery and anchor it to surrounding tissues.

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  • 5. 

    When an artery or arteriole is damaged, its smooth muscle contracts producing

    • A tear in the artery

    • A branch off the artery called an arteriole

    • A vascular spasm

    • Tetanus

    • Constriction of the outer four layers

    Correct Answer
    A. A vascular spasm
    Explanation
    When an artery or arteriole is damaged, the smooth muscle surrounding it contracts, causing a vascular spasm. This is a protective mechanism that helps to reduce blood loss from the damaged vessel. The contraction of the smooth muscle narrows the diameter of the artery or arteriole, restricting blood flow to the area and allowing time for clotting factors to be activated and a blood clot to form. This temporary constriction helps to seal off the damaged area and prevent further bleeding.

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  • 6. 

    Elastic arteries function as a

    • Vasodilator

    • Conduit to the tissues of the trunk only

    • Barrier to microcirculation

    • Pressure reservoir

    • Vasoconstrictors only

    Correct Answer
    A. Pressure reservoir
    Explanation
    Elastic arteries function as pressure reservoirs. This means that they are able to stretch and store the pressure generated by the heart during systole (contraction) and then recoil during diastole (relaxation), maintaining a constant pressure and ensuring continuous blood flow throughout the cardiac cycle. This property allows for efficient distribution of blood to the various organs and tissues of the body.

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  • 7. 

    These vessels make up the largest blood reservoir.

    • Arteries and arterioles

    • Arterioles and capillaries

    • Venules and capillaries

    • Veins and venules

    • Aorta and veins

    Correct Answer
    A. Veins and venules
    Explanation
    Veins and venules make up the largest blood reservoir because they have a larger capacity to hold blood compared to other blood vessels. They have thin walls and low pressure, allowing them to stretch and accommodate a larger volume of blood. This helps regulate blood flow and maintain blood pressure, especially during periods of increased demand or decreased supply. Additionally, veins and venules are found throughout the body, allowing for efficient distribution and collection of blood from various tissues and organs.

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  • 8. 

    This vessel plays a key role in regulating blood flow into capillaries.

    • Arteries

    • Arterioles

    • Venules

    • Veins

    • Aorta

    Correct Answer
    A. Arterioles
    Explanation
    Arterioles are small blood vessels that connect arteries to capillaries. They play a key role in regulating blood flow into capillaries by constricting or dilating their diameter. This constriction and dilation help control the amount of blood that enters the capillaries, which in turn affects blood pressure and the distribution of oxygen and nutrients to different tissues. Therefore, arterioles are crucial in regulating blood flow into capillaries and maintaining overall cardiovascular health.

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  • 9. 

    Which of the below is NOT found in arteries but is found in veins?

    • Tunica externa

    • Tunica media

    • Tunica interna

    • Valves

    Correct Answer
    A. Valves
    Explanation
    Valves are NOT found in arteries but are found in veins. Valves are one-way structures that help prevent the backflow of blood in veins, ensuring that blood flows in the correct direction towards the heart. Arteries, on the other hand, have thicker walls and do not require valves as they carry oxygenated blood away from the heart to the rest of the body.

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  • 10. 

    Capillaries are also known as

    • Exchange vessels

    • Vasoconstrictors

    • Vasodilators

    • Pressure reservoirs

    • Distributing vessels

    Correct Answer
    A. Exchange vessels
    Explanation
    Capillaries are known as exchange vessels because they are the smallest blood vessels in the body and their main function is to facilitate the exchange of oxygen, nutrients, and waste products between the blood and the surrounding tissues. Capillaries have thin walls and a large surface area, which allows for efficient diffusion of substances. They connect the arterioles and venules, forming a network throughout the body.

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  • 11. 

    Which of the below is the most important capillary exchange method?

    • Diffusion

    • Transcytosis

    • Bulk flow

    • Active transport

    • Primary transport

    Correct Answer
    A. Diffusion
    Explanation
    Diffusion is the most important capillary exchange method because it is the process by which molecules move from an area of higher concentration to an area of lower concentration. In capillary exchange, oxygen, nutrients, and waste products are exchanged between the blood and the surrounding tissues through the thin walls of the capillaries. This exchange occurs primarily through diffusion, as molecules such as oxygen and carbon dioxide passively move across the capillary walls to reach equilibrium.

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  • 12. 

    These control the flow of blood through a capillary bed.

    • Thoroughfare channel

    • Precapillary sphincter

    • Postcapillary sphincter

    • Venules

    • Veins

    Correct Answer
    A. Precapillary sphincter
    Explanation
    The precapillary sphincter is responsible for controlling the flow of blood through a capillary bed. It is located at the entrance of each capillary and can constrict or dilate to regulate the amount of blood flowing into the capillaries. When the precapillary sphincter is constricted, blood flow through the capillary bed is reduced, allowing for more blood to be redirected to other areas of the body. When the sphincter is dilated, blood flow through the capillaries increases, allowing for more oxygen and nutrients to be delivered to the tissues.

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  • 13. 

    Continuous capillaries can be found in the following tissues.

    • Skeletal muscle

    • Smooth muscle

    • Connective tissue

    • Lungs

    • All of the above

    Correct Answer
    A. All of the above
    Explanation
    Continuous capillaries are a type of blood vessel that have a complete endothelial lining with tight junctions between cells, making them impermeable to large molecules. They can be found in various tissues, including skeletal muscle, smooth muscle, connective tissue, and lungs. Therefore, the correct answer is "All of the above".

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  • 14. 

    The alternate route of blood flow to a body part through an anastomosis is called

    • Anastome

    • Blood reservoir

    • Detour blood

    • Collateral circulation

    • Microcirculation

    Correct Answer
    A. Collateral circulation
    Explanation
    Collateral circulation refers to the alternate route of blood flow to a body part through an anastomosis. This means that when there is a blockage or obstruction in the normal blood vessels supplying a particular area, blood can still reach that area through the collateral vessels. These collateral vessels act as a detour or alternate pathway for blood flow, ensuring that the tissues receive adequate oxygen and nutrients.

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  • 15. 

    The largest factor that promotes reabsorption of fluids, into blood, from the interstitial fluids is

    • Tissue hydrostatic pressure

    • Tissue osmotic pressure

    • Blood osmotic pressure

    • Blood hydrostatic pressure

    • Colloid pressure

    Correct Answer
    A. Blood osmotic pressure
    Explanation
    Blood osmotic pressure is the correct answer because it is the pressure exerted by the proteins in the blood plasma that pulls fluid back into the blood vessels from the interstitial fluid. This osmotic pressure is created by the presence of proteins, such as albumin, in the blood that cannot easily pass through the walls of the blood vessels. As a result, these proteins create a higher solute concentration in the blood, causing water to move from the interstitial fluid, where the solute concentration is lower, into the blood vessels. This process helps to maintain fluid balance in the body.

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  • 16. 

    The pressure driven movement of fluids and solutes from blood into interstitial fluid is called

    • Reabsorption

    • Filtration

    • Bulk flow

    • Hydrostatic pressure

    • Colloid pressure

    Correct Answer
    A. Bulk flow
    Explanation
    Bulk flow refers to the pressure driven movement of fluids and solutes from blood into interstitial fluid. It involves the movement of large volumes of fluid and solutes across a membrane or through a capillary. This process is important for maintaining fluid balance and exchanging nutrients, waste products, and gases between the blood and tissues. Unlike reabsorption, which refers to the movement of substances back into the blood, or filtration, which refers to the movement of substances out of the blood, bulk flow describes the overall movement of fluid and solutes in a particular direction driven by pressure differentials.

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  • 17. 

    This is the volume of blood that flows through any tissue in a given time period.

    • Microcirculation

    • Circulation

    • Blood flow

    • Blood pressure

    • Resistance

    Correct Answer
    A. Blood flow
    Explanation
    Blood flow refers to the movement of blood through the circulatory system. It is the volume of blood that passes through any tissue in a given time period. Blood flow is essential for delivering oxygen and nutrients to the body's cells and removing waste products. It is regulated by factors such as blood pressure, resistance in the blood vessels, and the pumping action of the heart. Overall, blood flow is crucial for maintaining proper functioning of the body's tissues and organs.

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  • 18. 

    Blood flow depends on which of following criteria.

    • Blood pressure

    • Systemic vascular resistance

    • Blood type

    • Blood pressure and systemic vascular pressure

    • Blood pressure and heart rate

    Correct Answer
    A. Blood pressure and systemic vascular pressure
    Explanation
    Blood flow depends on both blood pressure and systemic vascular resistance. Blood pressure is the force exerted by the blood against the walls of the blood vessels, and it determines the rate at which blood flows through the vessels. Systemic vascular resistance refers to the resistance encountered by the blood as it flows through the blood vessels. When blood vessels constrict or narrow, the resistance increases, which can decrease blood flow. Therefore, both blood pressure and systemic vascular resistance play a crucial role in regulating blood flow throughout the body.

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  • 19. 

    Which of the below would NOT increase blood pressure.

    • Increased blood volume

    • Increased sympathetic stimulation

    • Increased heart rate

    • Increased stroke volume

    • Decreased cardiac output

    Correct Answer
    A. Decreased cardiac output
    Explanation
    Decreased cardiac output would not increase blood pressure because cardiac output is the amount of blood pumped by the heart per minute. When cardiac output decreases, there is less blood being pumped into the arteries, resulting in lower blood pressure.

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  • 20. 

    Which of the below factors do NOT increase systemic vascular resistance?

    • Decreased vessel lumen diameter

    • Increased blood viscosity

    • Decreased vessel length

    • Increased vasodilation

    • Increased blood cell count

    Correct Answer
    A. Decreased vessel length
    Explanation
    Decreased vessel length does not increase systemic vascular resistance. Systemic vascular resistance refers to the resistance encountered by blood flow in the blood vessels throughout the body. Factors that increase resistance include decreased vessel lumen diameter, increased blood viscosity, and increased blood cell count. However, vessel length does not directly affect resistance.

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  • 21. 

    This depends mostly on the ratio of RBC to plasma volume.

    • Total blood volume

    • Blood viscosity

    • Systemic resistance

    • Blood vessel length

    • Size of vessel lumen

    Correct Answer
    A. Blood viscosity
    Explanation
    The viscosity of blood refers to its thickness or resistance to flow. It depends on factors such as the ratio of red blood cells to plasma volume. Higher levels of red blood cells can increase blood viscosity, making it thicker and more resistant to flow. This can affect the overall circulation and increase the workload on the heart. Therefore, blood viscosity is an important factor to consider when assessing the efficiency of blood flow in the body.

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  • 22. 

    Circulation time

    • Varies with diet

    • Is set by the hypothalamus

    • In a resting person is normally 1 minute

    • Depends on hormones from the liver

    • Will stop a heart if it is lower than 20 seconds

    Correct Answer
    A. In a resting person is normally 1 minute
    Explanation
    Circulation time refers to the time it takes for blood to complete one full circuit through the body. In a resting person, this time is normally around 1 minute. This means that it takes approximately 1 minute for the blood to travel from the heart, through the arteries, capillaries, and veins, and back to the heart again. This time can vary depending on factors such as activity level, diet, and overall health. However, in a resting state, 1 minute is the average circulation time.

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  • 23. 

    The cardiovascular center is located

    • In the thorax

    • In the cerebral cortex

    • In the cerebellum

    • In the medulla oblongata

    • In the hypothalamus

    Correct Answer
    A. In the medulla oblongata
    Explanation
    The cardiovascular center is located in the medulla oblongata. This part of the brain is responsible for regulating and controlling many vital functions, including heart rate, blood pressure, and blood vessel diameter. It receives input from various sensors in the body and sends signals to the heart and blood vessels to adjust their activity accordingly. The medulla oblongata plays a crucial role in maintaining cardiovascular homeostasis and ensuring proper circulation throughout the body.

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  • 24. 

    Which of the below factors is most important in forcing blood flow through veins?

    • Heart rate

    • Stroke volume

    • Muscular activity

    • Blood velocity

    • Valve opening

    Correct Answer
    A. Muscular activity
    Explanation
    Muscular activity is the most important factor in forcing blood flow through veins. When muscles contract, they squeeze the veins and help push the blood towards the heart. This is especially important in the legs, where the muscles act as pumps to overcome the force of gravity and prevent blood from pooling in the lower extremities. Muscular activity also helps to increase blood flow and oxygen delivery to the working muscles during exercise.

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  • 25. 

    Which of the below would be the response of the body as a result of decreased frequency of action potentials arising from the baroreceptors?

    • Increased blood pressure

    • Increased parasympathetic stimulation

    • Decreased heart rate

    • Decreased stroke volume

    • Decreased cardiac output

    Correct Answer
    A. Increased blood pressure
    Explanation
    A decreased frequency of action potentials arising from the baroreceptors would result in a decreased inhibitory signal being sent to the cardiovascular center in the brain. This would lead to a decrease in parasympathetic stimulation and an increase in sympathetic stimulation. Increased sympathetic stimulation would cause vasoconstriction, leading to increased peripheral resistance and increased blood pressure. Therefore, the correct answer is increased blood pressure.

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  • 26. 

    Which of the following hormones would NOT cause an increase in blood pressure?

    • Atrial Natriuretic Peptide

    • Antidiuretic Hormone

    • Aldosterone

    • Angiotensin

    • Increased Norepinephrine

    Correct Answer
    A. Atrial Natriuretic Peptide
    Explanation
    Atrial Natriuretic Peptide is a hormone that is released by the heart in response to high blood pressure. It acts to decrease blood pressure by promoting vasodilation (widening of blood vessels) and increasing the excretion of sodium and water by the kidneys. Therefore, it would not cause an increase in blood pressure.

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  • 27. 

    Chemoreceptors in blood vessels measuring high levels of blood carbon dioxide would NOT cause which of the following

    • Increased heart rate

    • Increased vasoconstriction of blood vessels

    • Increased blood pressure

    • Decreased respiratory rate

    • Decreased heart rate

    Correct Answer
    A. Decreased respiratory rate
    Explanation
    Chemoreceptors in blood vessels measure the levels of carbon dioxide in the blood. When these chemoreceptors detect high levels of carbon dioxide, they send signals to the respiratory centers in the brainstem, which in turn increase the respiratory rate. This is because an increase in carbon dioxide indicates a need for more oxygen and the removal of waste carbon dioxide from the body. Therefore, it can be inferred that if the chemoreceptors are measuring high levels of carbon dioxide, it would NOT cause a decreased respiratory rate.

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  • 28. 

    The myogenic response make smooth muscle

    • Contract more forcefully when stretched

    • Contract more forcefully when relaxed

    • Stay in an isotonic state

    • Less elastic

    • More elastic

    Correct Answer
    A. Contract more forcefully when stretched
    Explanation
    The myogenic response refers to the ability of smooth muscle to contract more forcefully when it is stretched. This response helps to maintain the appropriate level of tension in blood vessels and other hollow organs. When smooth muscle is stretched, it activates stretch-sensitive ion channels, leading to an influx of calcium ions into the muscle cells. This increase in calcium concentration triggers the contraction of the smooth muscle, resulting in a more forceful contraction. Therefore, when smooth muscle is stretched, it contracts more forcefully.

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  • 29. 

    What do these chemicals have in common: potassium, hydrogen ions, lactic acid, nitric oxide and adenosine?

    • They are all potent vasoconstrictors

    • They are all potent vasodilators

    • They are used to begin smooth muscle contractions

    • They regulate the cardiac center of the hypothalamus

    • They negatively affect systole

    Correct Answer
    A. They are all potent vasodilators
    Explanation
    Potassium, hydrogen ions, lactic acid, nitric oxide, and adenosine are all substances that have the ability to dilate blood vessels, leading to an increase in blood flow. This makes them potent vasodilators.

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  • 30. 

    Where can pulse not be felt?

    • Arteries

    • Veins

    • Venules

    • Capillaries

    • Arterioles

    Correct Answer
    A. Capillaries
    Explanation
    Pulse cannot be felt in capillaries because capillaries are the smallest blood vessels in the body and have thin walls. They are responsible for the exchange of oxygen, nutrients, and waste products between the blood and tissues. Due to their small size and thin walls, the pulsatile flow of blood is not strong enough to be felt in capillaries. Pulse is typically felt in larger arteries, such as the radial artery in the wrist, where the pressure waves generated by the heartbeat can be palpated.

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  • 31. 

    This pressure provides information about the condition of the cardiovascular system such as atherosclerosis and patent ductus arteriosus.

    • Diastolic blood pressure

    • Systolic blood pressure

    • Pulse pressure

    • Venule pressure

    • Capillary pressure

    Correct Answer
    A. Pulse pressure
    Explanation
    Pulse pressure is the difference between systolic blood pressure and diastolic blood pressure. It provides information about the strength and elasticity of the arteries. A high pulse pressure may indicate stiff arteries, which can be a sign of atherosclerosis. It can also indicate an increased risk of cardiovascular diseases. Patent ductus arteriosus is a condition where a blood vessel that should have closed after birth remains open, causing abnormal blood flow. While pulse pressure does not directly provide information about this condition, it can be used in conjunction with other diagnostic tests to assess the cardiovascular system.

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  • 32. 

    This type of shock is due to decreased blood volume.

    • Hypovolemic

    • Cardiogenic

    • Vascular

    • Obstructive

    • Neurogenic

    Correct Answer
    A. Hypovolemic
    Explanation
    Hypovolemic shock occurs when there is a significant decrease in blood volume. This can be caused by excessive bleeding, severe dehydration, or fluid loss from burns or other injuries. The decreased blood volume leads to inadequate perfusion of organs and tissues, resulting in symptoms such as low blood pressure, rapid heart rate, and decreased urine output. Treatment typically involves replenishing fluids and addressing the underlying cause of the fluid loss.

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  • 33. 

    What do the following have in common: superficial temporal artery, brachial artery and dorsal artery of the foot?

    • They are all areas where you can not hear Korotkoff sounds

    • They are all only found on the left side of the body

    • They are all pulse points

    • None of them contain baroreceptors

    • All of the are connected to each other by capillary beds

    Correct Answer
    A. They are all pulse points
    Explanation
    The given correct answer states that the superficial temporal artery, brachial artery, and dorsal artery of the foot are all pulse points. This means that these arteries are easily accessible and commonly used to measure a person's pulse rate.

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  • 34. 

    Which of the following is not a response to hypovolemic shock?

    • Activation of the RAA system

    • Secretion of ADH

    • Activation of the sympathetic division of the ANS

    • Release of vasoconstrictors

    • Release of vasodilators

    Correct Answer
    A. Release of vasoconstrictors
    Explanation
    Release of vasoconstrictors is not a response to hypovolemic shock. Hypovolemic shock is a condition characterized by a significant decrease in blood volume, leading to inadequate tissue perfusion. In response to hypovolemic shock, the body activates compensatory mechanisms to restore blood pressure and tissue perfusion. These mechanisms include activation of the RAA system, secretion of ADH, activation of the sympathetic division of the ANS, and release of vasodilators. The release of vasoconstrictors would further constrict blood vessels, exacerbating the already decreased blood flow, and would not be a beneficial response in this situation.

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  • 35. 

    All the veins of the systemic circulation drain into the

    • Superior vena cava

    • Inferior vena cava

    • Coronary sinus

    • Superior and inferior vena cava

    • Superior and inferior vena cava and coronary sinus

    Correct Answer
    A. Superior and inferior vena cava and coronary sinus
    Explanation
    The correct answer is "Superior and inferior vena cava and coronary sinus." This is because all the veins of the systemic circulation, which includes veins from the entire body except the lungs, drain into these three structures. The superior vena cava receives blood from the upper body, including the head, neck, and upper limbs. The inferior vena cava receives blood from the lower body, including the abdomen, pelvis, and lower limbs. The coronary sinus receives blood from the heart itself. Therefore, the correct answer is that all these veins drain into the superior and inferior vena cava and the coronary sinus.

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  • 36. 

    The pulmonary trunk divides into

    • Right pulmonary artery

    • Left pulmonary artery

    • Pulmonary veins

    • Right and left pulmonary arteries

    • Right pulmonary vein and artery

    Correct Answer
    A. Right and left pulmonary arteries
    Explanation
    The pulmonary trunk, which is a major blood vessel, divides into two branches known as the right and left pulmonary arteries. These arteries carry deoxygenated blood from the heart to the lungs, where it is oxygenated. Therefore, the correct answer is "Right and left pulmonary arteries."

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  • 37. 

    In fetal circulation what is the opening between the right and left atria called?

    • Ductus venosus

    • Umbilicus

    • Umbilical vein

    • Foramen ovale

    • Placenta

    Correct Answer
    A. Foramen ovale
    Explanation
    The opening between the right and left atria in fetal circulation is called the foramen ovale. This opening allows blood to bypass the lungs and flow directly from the right atrium to the left atrium. It is a normal part of fetal development and typically closes shortly after birth.

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  • 38. 

    Which of the below vessels is a pulse point at the wrist?

    • Radial artery

    • Subclavian artery

    • Axillary artery

    • Cephalic artery

    • Palmar artery

    Correct Answer
    A. Radial artery
    Explanation
    The radial artery is a pulse point at the wrist. This artery runs along the thumb side of the forearm and crosses the wrist, where it can be felt as a pulse. It is commonly used to measure the heart rate and assess the strength of the pulse. The other options listed are not pulse points at the wrist.

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  • 39. 

    Which of the below vessels supplies blood to the intestines?

    • Radial artery

    • Subclavian artery

    • Mesenteric artery

    • Coronary artery

    • Popliteal artery

    Correct Answer
    A. Mesenteric artery
    Explanation
    The mesenteric artery supplies blood to the intestines.

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  • 40. 

    Which of the below vessels supplies blood to the kidney?

    • Hepatic artery

    • Renal artery

    • Mesenteric artery

    • Coronary artery

    • Popliteal artery

    Correct Answer
    A. Renal artery
    Explanation
    The renal artery supplies blood to the kidney. The renal artery branches off from the abdominal aorta and carries oxygenated blood to the kidneys for filtration and waste removal. It is an essential vessel for maintaining proper kidney function and ensuring the delivery of nutrients and oxygen to the kidney tissues.

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  • 41. 

    Which of the below vessels drains blood from the lower leg?

    • Jugular vein

    • Superior vena cava

    • Tibial vein

    • Coronary vein

    • Iliac vein

    Correct Answer
    A. Tibial vein
    Explanation
    The tibial vein is the correct answer because it drains blood from the lower leg. The jugular vein drains blood from the head and neck, the superior vena cava drains blood from the upper body, the coronary vein drains blood from the heart, and the iliac vein drains blood from the pelvis and lower abdomen.

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  • 42. 

    Which of the below vessels drains blood from the head and neck?

    • Carotid vein

    • Inferior vena cava

    • Axillary vein

    • Femoral vein

    • Jugular vein

    Correct Answer
    A. Jugular vein
    Explanation
    The jugular vein is the correct answer because it is responsible for draining blood from the head and neck. It is a large vein located in the neck that carries deoxygenated blood from the brain, face, and neck back to the heart. The carotid vein carries oxygenated blood to the head, the inferior vena cava drains blood from the lower body, the axillary vein drains blood from the armpit area, and the femoral vein drains blood from the thigh.

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  • 43. 

    Which of the below vessels drains blood from the lower body to the right atrium?

    • Inferior vena cava

    • Superior vena cava

    • Tibial vein

    • Coronary vein

    • Iliac vein

    Correct Answer
    A. Inferior vena cava
    Explanation
    The inferior vena cava is a large vein that carries deoxygenated blood from the lower body to the right atrium of the heart. It is responsible for draining blood from the organs and tissues below the diaphragm, including the legs, pelvis, and abdomen. The superior vena cava, on the other hand, drains blood from the upper body to the right atrium. The tibial vein, coronary vein, and iliac vein are not involved in draining blood from the lower body to the right atrium.

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  • 44. 

    After birth when the umbilical cord is cut what do the umbilical arteries fill with?

    • Placental fluid

    • Blood

    • Connective tissue

    • Smooth muscle

    • Capillary beds

    Correct Answer
    A. Connective tissue
    Explanation
    After birth, when the umbilical cord is cut, the umbilical arteries fill with connective tissue. This is because the umbilical arteries, which carry deoxygenated blood from the fetus to the placenta, are no longer needed once the baby is born. As the umbilical cord dries and eventually falls off, the arteries are replaced by connective tissue, which helps to close off the blood vessels and prevent bleeding. This process is a natural part of the postnatal adaptation and healing of the newborn.

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
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  • Apr 28, 2012
    Quiz Created by
    Mywickedream

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